Charles Ellson wrote:
Up to around 3000v DC off a local generator IIRC (thus the dimming of
the prison lights as seen in many films is a load of old cobblers).
There was a DC v AC competition involving the public killing of an
elephant in the early days of deciding the "best" way to fry people;
prior to that Thomas Edison "perfected" his AC system by killing
numerous cats and dogs in experiments

Was it not Edison who was so convinced that DC was the only way to
proceed and tried his best to show that Tesla and his AC system was a
mistake?
Bruce